Submission #313773

#	Time	Username	Problem	Language	Result	Execution time	Memory
313773		Trickster	Money (IZhO17_money)	C++14	0 / 100	1 ms	512 KiB

money

#include <algorithm>
#include <string.h>
#include <iostream>
#include <stdio.h>
#include <vector>
#include <queue>
#include <cmath>
#include <set>
#include <map>

using namespace std;

#define N 1000010
#define ff first
#define ss second
#define ll long long
#define pb push_back
#define mod 1000000007
#define pii pair <int, int>
#define sz(a) int(a.size())
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
ll bigmod(ll a,ll e) {if(e==0)return 1;ll x=bigmod(a*a%mod,e>>1);return e&1?x*a%mod:x;}

int n;
int v[N];
int T[N*4];

void upd(int pos, int l, int r, int node)
{
    if(l == r) {
        T[node]++;
        return;
    }

    if(pos <= (l+r)/2) upd(pos, l, (l+r)/2, node*2);
    else upd(pos, (l+r)/2+1, r, node*2+1);

    T[node] = T[node*2] + T[node*2+1];
}

int tap(int a, int b, int l, int r, int node)
{
    if(l > b || r < a) return 0;

    if(l >= a && r <= b) return T[node];

    return tap(a, b, l, (l+r)/2, node*2) + tap(a, b, (l+r)/2+1, r, node*2+1);
}

int main()
{
    cin >> n;

    for(int i = 1; i <= n; i++) cin >> v[i];

    int ans = 0, l = 1;
    for(int i = 1; i <= n; i++) {
        int ok = tap(v[l], v[i+1], 1, n, 1);

        if(ok || v[i+1] < v[i]) {
            ans ++;
            while(l <= i) upd(v[l++], 1, n, 1);
        }
    }

    cout << ans;
}
/*
6
3 6 4 5 1 2
6
5 4 6 3 1 2
*/

Compilation message (stderr)

money.cpp:22: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
   22 | #pragma GCC optimization ("O3")
      | 
money.cpp:23: warning: ignoring #pragma GCC optimization [-Wunknown-pragmas]
   23 | #pragma GCC optimization ("unroll-loops")
      |

• Subtask 1: 0 / 9
• Subtask 2: 0 / 16
• Subtask 3: 0 / 20
• Subtask 4: 0 / 55